Frequently Asked Questions

Is Dr. Johnson a good doctor?

Dr. Johnson is a very good doctor. Many physicians take special care to seek him out to provide care for them, their families, and their most-complex patients. Other eye doctors often ask for his help and advice.

What's up with the bow-tie?

It's a little different. He doesn't wear them most of the time anymore. His daughter calls them "tie-bows."

How long will my exam take?

Expect to be in the office for at least one hour for every visit. New or complex examinations, or surgical planning, can take longer. The staff often takes time to perform tests, measure glasses, or give drops before you see the doctor.

Will my eyes be dilated?

It is possible your exam will require pupil dilation on any given visit. You should plan for this. Dilation makes some patients unsafe to walk, work, study, drive, read, bear bright lights, or do many routine activities. You should bring sunglasses and a driver to every visit.

What is the purpose of pupil dilation?

Dilation allows the doctor to see the back half of the eye (the retina, macula, and optic nerve). Many eye problems arise from these areas. Every complete exam requires dilation to fully evaluate the eye health.

What if the doctor is running late?

Dr. Johnson runs pretty well. Scheduling visits is sometimes an inexact process. The doctor needs to take enough time for every patient- including you. Sometimes there are emergencies. You should ask the staff at the front desk when you check in if you are concerned or in a special hurry. Imagine, if you don't like being late, how much less the entire staff and Dr. Johnson like to be late.

What is a refraction?

Refraction is the eyeglass power test ("which is better one or two?") to measure if you need glasses or to determine how well you can see properly.

I don't like my new glasses, what happened (a not-so-frequently-asked question)?

Measuring glasses is complex, and influenced by a lot of factors. Machines, lenses, patient preferences, and the doctor's experience all go into the prescription. Sometimes what seems best on one day doesn't work out long term in real world use. There can be problems with frame fit or wear, or with the way the glasses are made. If you have a problem, try wearing them for a while to give them a chance, but if they still cause problems come back in. We can usually figure things out and remake them for no additional charge. Trust us, both Dr. Johnson and Pat Vedral try hard and dislike eyeglass prescription problems every bit as much as you do. Probably more.

What is a gonioscopy?

Gonioscopy is a test done to determine whether a patient has open or closed-angle glaucoma, which are treated differently. A special diagnostic lens is used to examine the fluid outflow channels of the eyes.

What is a visual field?

A visual field test is a test of peripheral vision for glaucoma, strokes, strokes in the eye bloodflow, for Plaquenil use, or to determine if droopy lids are blocking vision.

What are external photos?

External photos are taken for eyelid and other conditions to document them and allow future comparison.

What are fundus photos?

Fundus photos are taken for glaucoma, diabetes, macular degeneration, puckers, macular holes, Plaquenil, choroidal nevi or "freckles, bleeding, optic nerve diseases, strokelike conditions in the eye, scars, drusen, and other conditions.

What is an extended ophthalmoscopy?

Extended ophthalmoscopy is a detailed drawing of the retina to stage and document conditions such as retinal tears, puckers, bleeding, diabetes, detachments, lattice, holes, strokes in the eye, nevi, growths in the eye, and other conditions.

What is an OCT test?

OCT testing is done for macular diseases (macular degeneration, holes, diabetes, puckers, macular edema), visual distortions and loss, glaucoma, strokelike events in the eye, and other conditions.

What is an A-Scan / Laser Interferometer scan?

A-scanning or IOL master scanning (laser interferometry) is done to measure the correct lens implant power for cataract surgery to help reduce eyeglass dependence.

Frequently Asked Billing Questions

Will you bill my insurance?

Yes, we do bill both your primary insurance and secondary insurance if you have Medicare as primary. We will bill your primary insurance only if you carry two policies. This is a courtesy that we provide to help you.

Why do I have a deductible?

Many insurance companies include a deductible in your insurance plan. The coverage provided by your insurance is an agreement between you and your insurance company. A deductible is the amount of money you will have to pay before the insurance begins to pay. This varies for everyone. Some individuals have no deductibles, while some plans are very high.

What is my Medicare deductible?

Your Medicare deductible is currently $155 and is collectable annually at the beginning of the year. We often help you complete your deductible by collecting the money up front and letting Medicare know we have collected the deductible amount.

Why am I receiving a bill?

Once we have filed your visit to your insurance company, we receive notice from your insurance plan if we have to collect directly from you. That is when we send you a bill.

Why was the medical service denied?

Insurance companies are in the business of making money. They are not in the business of providing high-quality medical care. It is Dr. Johnson's professional responsibility to make his decisions based upon what will be best for you, not the insurance company.

Why does medical care cost so much?

Most medical fees are set by Medicare. They are not determined by Dr. Johnson. Physicians are required to adhere to the guidelines. Sometimes higher fees are a reflection of the expensive equipment used, or of the expertise needed to perform and interpret the tests.

The doctor only spent a few minutes in the room with me. The fees seem too high?

Physicians spend their lifetimes developing their expertise and skills. Your examination and treatment didn't take minutes- it took years and years to perform.

News & Features


Welcome Back to all of our Winter Snowbirds!


Dr. Johnson has achieved the "Lifelong Education for the Ophthalmologist Continuing Education Award"! The Award is presented in recognition of his participation in the American Academy of Ophthalmology.


Come in and ask Dr. Johnson about the latest in laser cataract surgery!


We have new electronic prescribing software to make your care and treatment even easier.

Our referral to your friends and family is the greatest compliment you can give.


Surgical Services by Dr. Mark Johnson are available at St. Andrews Surgery Center.


Patricia Vedral, our Licensed Optician, is always there to help you. If you want something we don't have in our shop, please ask her to find it for you as many frames can be ordered.


Welcome Back to all from the North! Let us know how we can help you or do our job better!